how much is that doggie in the window

The one that is always for sale,
How much is that doggie in the window,
It hurts as the fleas have it's tail....

The back legs have worn off this dog...
It's toenails are worn from scratching..
She's got no hair,
She's in despair,
Her fleas eggs have started hatching.
Oh what do I do,
Do I give her up?
Do I take her off too the pound?
I guess not, I'll cry
The cruel vet will try
And take my cash for one more round.